Final answer:
Winston is called a thought-criminal by his children in the dystopian novel '1984' by George Orwell, which portrays a society under total government control.
Step-by-step explanation:
The book in which children call a character named Winston a "thought-criminal" is 1984 by British writer George Orwell. This dystopian novel is set in a future society where the government, known as the Party, exerts total control over all aspects of life, including thoughts. The main character, Winston Smith, works for the Party but secretly despises its oppressive rule and is deemed a thought-criminal for his rebellious thoughts against the regime.